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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Provides support for the conversion of moodle1 backup to the moodle2 format
*
* @package mod_lesson
* @copyright 2011 Rossiani Wijaya <rwijaya@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* Lesson conversion handler
*/
class moodle1_mod_lesson_handler extends moodle1_mod_handler {
// @var array of answers, when there are more that 4 answers, we need to fix <jumpto>.
protected $answers;
// @var stdClass a page object of the current page
protected $page;
// @var array of page objects to store entire pages, to help generate nextpageid and prevpageid in data
protected $pages;
// @var int a page id (previous)
protected $prevpageid = 0;
/** @var moodle1_file_manager */
protected $fileman = null;
/** @var int cmid */
protected $moduleid = null;
/**
* Declare the paths in moodle.xml we are able to convert
*
* The method returns list of {@link convert_path} instances.
* For each path returned, the corresponding conversion method must be
* defined.
*
* Note that the path /MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON does not
* actually exist in the file. The last element with the module name was
* appended by the moodle1_converter class.
*
* @return array of {@link convert_path} instances
*/
public function get_paths() {
return array(
new convert_path(
'lesson', '/MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON',
array(
'renamefields' => array(
'usegrademax' => 'usemaxgrade',
),
)
),
new convert_path(
'lesson_page', '/MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON/PAGES/PAGE',
array(
'newfields' => array(
'contentsformat' => FORMAT_MOODLE,
'nextpageid' => 0, //set to default to the next sequencial page in process_lesson_page()
'prevpageid' => 0
),
)
),
new convert_path(
'lesson_pages', '/MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON/PAGES'
),
new convert_path(
'lesson_answer', '/MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON/PAGES/PAGE/ANSWERS/ANSWER',
array(
'newfields' => array(
'answerformat' => 0,
'responseformat' => 0,
),
'renamefields' => array(
'answertext' => 'answer_text',
),
)
)
);
}
/**
* This is executed every time we have one /MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON
* data available
*/
public function process_lesson($data) {
// get the course module id and context id
$instanceid = $data['id'];
$cminfo = $this->get_cminfo($instanceid);
$this->moduleid = $cminfo['id'];
$contextid = $this->converter->get_contextid(CONTEXT_MODULE, $this->moduleid);
// get a fresh new file manager for this instance
$this->fileman = $this->converter->get_file_manager($contextid, 'mod_lesson');
// migrate referenced local media files
if (!empty($data['mediafile']) and strpos($data['mediafile'], '://') === false) {
$this->fileman->filearea = 'mediafile';
$this->fileman->itemid = 0;
try {
$this->fileman->migrate_file('course_files/'.$data['mediafile']);
} catch (moodle1_convert_exception $e) {
// the file probably does not exist
$this->log('error migrating lesson mediafile', backup::LOG_WARNING, 'course_files/'.$data['mediafile']);
}
}
// start writing lesson.xml
$this->open_xml_writer("activities/lesson_{$this->moduleid}/lesson.xml");
$this->xmlwriter->begin_tag('activity', array('id' => $instanceid, 'moduleid' => $this->moduleid,
'modulename' => 'lesson', 'contextid' => $contextid));
$this->xmlwriter->begin_tag('lesson', array('id' => $instanceid));
foreach ($data as $field => $value) {
if ($field <> 'id') {
$this->xmlwriter->full_tag($field, $value);
}
}
return $data;
}
public function on_lesson_pages_start() {
$this->xmlwriter->begin_tag('pages');
}
/**
* This is executed every time we have one /MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON/PAGES/PAGE
* data available
*/
public function process_lesson_page($data) {
global $CFG;
// replay the upgrade step 2009120801
if ($CFG->texteditors !== 'textarea') {
$data['contents'] = text_to_html($data['contents'], false, false, true);
$data['contentsformat'] = FORMAT_HTML;
}
// store page in pages
$this->page = new stdClass();
$this->page->id = $data['pageid'];
unset($data['pageid']);
$this->page->data = $data;
}
/**
* This is executed every time we have one /MOODLE_BACKUP/COURSE/MODULES/MOD/LESSON/PAGES/PAGE/ANSWERS/ANSWER
* data available
*/
public function process_lesson_answer($data) {
// replay the upgrade step 2010072003
$flags = intval($data['flags']);
if ($flags & 1) {
$data['answer_text'] = text_to_html($data['answer_text'], false, false, true);
$data['answerformat'] = FORMAT_HTML;
}
if ($flags & 2) {
$data['response'] = text_to_html($data['response'], false, false, true);
$data['responseformat'] = FORMAT_HTML;
}
// buffer for conversion of <jumpto> in line with
// upgrade step 2010121400 from mod/lesson/db/upgrade.php
$this->answers[] = $data;
}
public function on_lesson_page_end() {
$this->page->answers = $this->answers;
$this->pages[] = $this->page;
$firstbatch = count($this->pages) > 2;
$nextbatch = count($this->pages) > 1 && $this->prevpageid != 0;
if ( $firstbatch || $nextbatch ) { //we can write out 1 page atleast
if ($this->prevpageid == 0) {
// start writing with n-2 page (relative to this on_lesson_page_end() call)
$pg1 = $this->pages[1];
$pg0 = $this->pages[0];
$this->write_single_page_xml($pg0, 0, $pg1->id);
$this->prevpageid = $pg0->id;
array_shift($this->pages); //bye bye page0
}
$pg1 = $this->pages[0];
// write pg1 referencing prevpageid and pg2
$pg2 = $this->pages[1];
$this->write_single_page_xml($pg1, $this->prevpageid, $pg2->id);
$this->prevpageid = $pg1->id;
array_shift($this->pages); //throw written n-1th page
}
$this->answers = array(); //clear answers for the page ending. do not unset, object property will be missing.
$this->page = null;
}
public function on_lesson_pages_end() {
if ($this->pages) {
if (isset($this->pages[1])) { // write the case of only 2 pages.
$this->write_single_page_xml($this->pages[0], $this->prevpageid, $this->pages[1]->id);
$this->prevpageid = $this->pages[0]->id;
array_shift($this->pages);
}
//write the remaining (first/last) single page
$this->write_single_page_xml($this->pages[0], $this->prevpageid, 0);
}
$this->xmlwriter->end_tag('pages');
//reset
unset($this->pages);
$this->prevpageid = 0;
}
/**
* This is executed when we reach the closing </MOD> tag of our 'lesson' path
*/
public function on_lesson_end() {
// Append empty <overrides> subpath element.
$this->write_xml('overrides', array());
// finish writing lesson.xml
$this->xmlwriter->end_tag('lesson');
$this->xmlwriter->end_tag('activity');
$this->close_xml_writer();
// write inforef.xml
$this->open_xml_writer("activities/lesson_{$this->moduleid}/inforef.xml");
$this->xmlwriter->begin_tag('inforef');
$this->xmlwriter->begin_tag('fileref');
foreach ($this->fileman->get_fileids() as $fileid) {
$this->write_xml('file', array('id' => $fileid));
}
$this->xmlwriter->end_tag('fileref');
$this->xmlwriter->end_tag('inforef');
$this->close_xml_writer();
}
/**
* writes out the given page into the open xml handle
* @param type $page
* @param type $prevpageid
* @param type $nextpageid
*/
protected function write_single_page_xml($page, $prevpageid=0, $nextpageid=0) {
//mince nextpageid and prevpageid
$page->data['nextpageid'] = $nextpageid;
$page->data['prevpageid'] = $prevpageid;
// write out each page data
$this->xmlwriter->begin_tag('page', array('id' => $page->id));
foreach ($page->data as $field => $value) {
$this->xmlwriter->full_tag($field, $value);
}
//effectively on_lesson_answers_end(), where we write out answers for current page.
$answers = $page->answers;
$this->xmlwriter->begin_tag('answers');
$numanswers = count($answers);
if ($numanswers) { //if there are any answers (possible there are none!)
if ($numanswers > 3 && $page->data['qtype'] == 5) { //fix only jumpto only for matching question types.
if ($answers[0]['jumpto'] !== '0' || $answers[1]['jumpto'] !== '0') {
if ($answers[2]['jumpto'] !== '0') {
$answers[0]['jumpto'] = $answers[2]['jumpto'];
$answers[2]['jumpto'] = '0';
}
if ($answers[3]['jumpto'] !== '0') {
$answers[1]['jumpto'] = $answers[3]['jumpto'];
$answers[3]['jumpto'] = '0';
}
}
}
foreach ($answers as $data) {
$this->write_xml('answer', $data, array('/answer/id'));
}
}
$this->xmlwriter->end_tag('answers');
// answers is now closed for current page. Ending the page.
$this->xmlwriter->end_tag('page');
}
}